The WRX TR models hit the market in 2006. TR stands for "Tuner Ready," meaning it's a stripped down version of the WRX. Although it had the same 2.5 L engine and 5 speed transmission as the WRX, it typically came with little to no options which made the price lower. It was a marketing strategy for Subaru to sell more cars cheaper and to entice the tuner crowd to purchase a "bare-bones" model since it didn't make sense to pay for all kinds of extra options when that money could be spent modifying any number of other parts on the car.